build(deps): bump base64 from 0.21.2 to 0.21.5

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.21.2 to 0.21.5.
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](https://github.com/marshallpierce/rust-base64/compare/v0.21.2...v0.21.5)

---
updated-dependencies:
- dependency-name: base64
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -260,9 +260,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.21.2"
+version = "0.21.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
+checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
 
 [[package]]
 name = "bdk"
@@ -2859,7 +2859,7 @@ version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3163d2912b7c3b52d651a055f2c7eec9ba5cd22d26ef75b8dd3a59980b185923"
 dependencies = [
- "base64 0.21.2",
+ "base64 0.21.5",
  "serde",
 ]
 
@@ -3380,7 +3380,7 @@ version = "0.11.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cde824a14b7c14f85caff81225f411faacc04a2013f41670f41443742b1c1c55"
 dependencies = [
- "base64 0.21.2",
+ "base64 0.21.5",
  "bytes",
  "encoding_rs",
  "futures-core",
@@ -4294,7 +4294,7 @@ dependencies = [
  "async-trait",
  "atty",
  "backoff",
- "base64 0.21.2",
+ "base64 0.21.5",
  "bdk",
  "big-bytes",
  "bitcoin",